package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.StemealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
@Transactional
@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private StemealDishMapper stemealDishMapper;

    /*
     * 新增菜品和口味
     */
    @Transactional
    @Override
    public void savewithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
        }
        dishFlavorMapper.insertBatch(flavors);
    }

    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        Long total = page.getTotal();
        List<DishVO> dishVOS = page.getResult();
        return new PageResult(total, dishVOS);
    }

    /*
    * 删除菜品
    * */
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否是起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE && dish != null) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否被套餐关联
        List<Long> setmealIds = stemealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
        /*for(Long id : ids) {
            dishMapper.deleteById(id);
            //删除关联菜品的口味表
            dishFlavorMapper.deleteByDishId(id);
        }*/
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);
    }
    /*
    * 回显菜品信息
    * */
    public DishVO getByIdwithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);

        List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavor);
        return dishVO;
    }

    /*
    * 修改菜品
    * */
    public void update(DishDTO dishDTO) {
        //先修改基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        dishMapper.update(dish);
        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && dishFlavors.size() > 0) {
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /*
    * 根据id修改菜品状态
    * */
    public void startOrStop(Integer status,Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.startOrStop(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /*
    * c端菜品查询
    * */
    public List<DishVO> listWithFlavor(Dish dish) {

            List<Dish> dishList = dishMapper.list(dish);

            List<DishVO> dishVOList = new ArrayList<>();

            for (Dish d : dishList) {
                DishVO dishVO = new DishVO();
                BeanUtils.copyProperties(d,dishVO);

                //根据菜品id查询对应的口味
                List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

                dishVO.setFlavors(flavors);
                dishVOList.add(dishVO);
            }

            return dishVOList;
        }
}
